1, cartoon dragon.
Draw the mouth in the middle of the ellipse, and draw the dragon's head and the lower body outside.
2. deer
Ellipse can also be extended to deer. Draw the head and limbs, and the deer is finished.
3. the plane.
Add the propeller and small wheels on the wing to the ellipse and the plane will be drawn.
4. Little pig.
Add the oval shape to the ears, mouth and limbs, and the naive pig is finished.
5, small fish.
Oval shape with fish scales and tail, and eyes, the lovely little fish is finished.
oval
It is the locus of the moving point P whose sum of distances from fixed points F 1 and F2 on the plane is equal to a constant (greater than |F 1F2|), and F 1 and F2 are called the two focuses of an ellipse. The mathematical expression is | pf1|+pf2 | = 2a (2a > | f1F2 |).
An ellipse is a conic curve, that is, the tangent of a cone to a plane.
The circumference of an ellipse is equal to the length of a specific sine curve in a period.
An ellipse is a closed cone section: a plane curve intersects a plane through a cone. There are many similarities between the other two forms of ellipse and cone section: parabola and hyperbola, which are both open and unbounded. The cross section of a cylinder is elliptical unless it is perpendicular to the axis of the cylinder.